[04/11] drm/i915/hpd: Replace the loop-within-loop with two independent loops
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Message ID 20200121171100.4370-5-ville.syrjala@linux.intel.com
State New
Headers show
Series
  • drm/i915: Hotplug cleanups
Related show

Commit Message

Ville Syrjälä Jan. 21, 2020, 5:10 p.m. UTC
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

No point in looping over all connectors for each hpd pin. Just loop
over each connector first and deal with each one's hpd pin. Then
loop over all the hpd pins to mark them as enabled again.

Also get rid of the MST special case as MST encoders simply don't
have a HPD pin and will get naturally fitered out.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_hotplug.c | 37 +++++++++++---------
 1 file changed, 20 insertions(+), 17 deletions(-)

Patch
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diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index 8a3e9e901cf7..f40e4ac8a26f 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -242,36 +242,39 @@  static void intel_hpd_irq_storm_reenable_work(struct work_struct *work)
 		container_of(work, typeof(*dev_priv),
 			     hotplug.reenable_work.work);
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_connector_list_iter conn_iter;
+	struct intel_connector *connector;
 	intel_wakeref_t wakeref;
 	enum hpd_pin pin;
 
 	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
 
 	spin_lock_irq(&dev_priv->irq_lock);
-	for_each_hpd_pin(pin) {
-		struct drm_connector_list_iter conn_iter;
-		struct intel_connector *connector;
 
-		if (dev_priv->hotplug.stats[pin].state != HPD_DISABLED)
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		pin = intel_connector_hpd_pin(connector);
+		if (pin == HPD_NONE ||
+		    dev_priv->hotplug.stats[pin].state != HPD_DISABLED)
 			continue;
 
-		dev_priv->hotplug.stats[pin].state = HPD_ENABLED;
+		if (connector->base.polled != connector->polled)
+			DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
+					 connector->base.name);
+		connector->base.polled = connector->polled;
+		if (!connector->base.polled)
+			connector->base.polled = DRM_CONNECTOR_POLL_HPD;
+	}
+	drm_connector_list_iter_end(&conn_iter);
 
-		drm_connector_list_iter_begin(dev, &conn_iter);
-		for_each_intel_connector_iter(connector, &conn_iter) {
-			if (intel_connector_hpd_pin(connector) == pin) {
-				if (connector->base.polled != connector->polled)
-					DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
-							 connector->base.name);
-				connector->base.polled = connector->polled;
-				if (!connector->base.polled)
-					connector->base.polled = DRM_CONNECTOR_POLL_HPD;
-			}
-		}
-		drm_connector_list_iter_end(&conn_iter);
+	for_each_hpd_pin(pin) {
+		if (dev_priv->hotplug.stats[pin].state == HPD_DISABLED)
+			dev_priv->hotplug.stats[pin].state = HPD_ENABLED;
 	}
+
 	if (dev_priv->display_irqs_enabled && dev_priv->display.hpd_irq_setup)
 		dev_priv->display.hpd_irq_setup(dev_priv);
+
 	spin_unlock_irq(&dev_priv->irq_lock);
 
 	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);